Google claimed quantum supremacy in 2019 — and sparked controversy

Competitors questioned whether the milestone had truly been achieved


Google's quantum computer Sycamore performed a calculation that would take thousands of years with a classical supercomputer, researchers claimed in 2019. An array of quantum computer chips is shown.


This article is only available to Science News subscribers.

Subscribers, enter your e-mail address to access our archives.

Not a subscriber?

Science News is a nonprofit.

Support us by subscribing now.

More Stories from Science News on Quantum Physics

From the Nature Index

Paid Content